Lenman initially joined Yorkshire Building Society, in 2017 as CFO, before briefly taking on the role of interim chief executive for just under a year between 2022 to 2023. He then reverted back to his role as CFO last year.
Prior to joining the society, he was a non-executive director for around a year at Coventry Building Society and before that was CFO at Alt-Fi.
Before that, he worked for around three years at BGL Group, initially as deputy CFO and then as CFO.
Lenman also worked for nearly five years at Lloyds Banking Group in various senior roles including retail products finance director, mortgages and savings finance director and director of direct and corporate partnerships.
Susan Allen, Chief Executive of Yorkshire Building Society, said: “I would like to thank Alasdair for his outstanding contribution to the society over the last seven years. He has been CFO during a period of significant challenge as we have addressed the complexities of the pandemic and a period of historically low interest rates.
“During this period, our mortgage and savings balances have increased to more than £45bn, we have consistently paid higher than the market average rate to our savers and delivered strong profitability.”
He added: “We are working with external executive search partners to find a permanent successor to Alasdair. In the meantime, I know colleagues will continue to ensure everything we do is in the long-term best interest of our members and customers.”
Lenman continued: “I have thoroughly enjoyed my time at Yorkshire Building Society, and it has been a great privilege to have been CFO at a member owned mutual building society.
“Now is the right time for me to plan my retirement, particularly when the society is in such good shape. I would like to thank all my colleagues for their dedication and hard work and know they will continue to put members at the heart of everything they do.”
